chkrootkit求助

benlan

今天收到服务器自动发过来的邮件

/etc/cron.daily/chkrootkit:

/usr/bin/find: head terminated by signal 13

是什么意思，是被入侵了吗，要做什么处理？

谢谢

benlan

/var/log/messages里面的信息

Jul 25 04:02:12 localhost syslogd 1.4.1: restart.
Jul 25 04:02:11 localhost chkrootkit: Checking `sniffer'... not tested: can't exec ./ifpromisc
Jul 25 04:02:11 localhost chkrootkit: Checking `w55808'... not infected
Jul 25 04:02:11 localhost chkrootkit: Checking `wted'... not tested: can't exec ./chkwtmp
Jul 25 04:02:11 localhost chkrootkit: Checking `scalper'... not infected
Jul 25 04:02:11 localhost chkrootkit: Checking `slapper'... not infected
Jul 25 04:02:11 localhost chkrootkit: Checking `z2'... not tested: can't exec ./chklastlog
Jul 25 04:02:11 localhost chkrootkit: Checking `chkutmp'... not tested: can't exec ./chkutmp
Jul 25 04:02:11 localhost chkrootkit: Checking `OSX_RSPLUG'... not infected

以前只是按教程搭了chkrootkit，不明白什么意思，达人帮忙分析一下，是什么意思